Acetylene-blowpipe.



` E. H. SMITH. ACETYLENE BLOWPIPE. APPLMTION FILED 1AN.23.119|4.

Patented M1120, 1915.

X H5455@ i219 E mw .Mw m VJ 7 MME E N.

EL'MER H. SMITH, or MINNEAroLIs, MINNESOTA.

` To all it muy concern: v 'n Be it known that I, ELMnn H. SMITH, citi- .v zen of the United States, resident of Min neapolis, county of Hennepin, State of Minnesota, have invented certain new and use- Improvements inv Acetylene-Blowpipes,

of which the-following is a specification.

My invention 'relates to blowr pipes designed for v use'with acetylene llames for metal cutting and welding purposes'l and the object of theinventionV is to improve the construction of blow pipe in general use to the end that a more thorough and uniform mixture ofgas and oxygen willtake place and' iareback .of the iamein the l burner will be positively prevented.

handlewith thetubes 3 and Ltand on these'.

The invention consists r,generally in'va. nous constructions and combmat1ons,'all

Yas 'heremafter descr1bed and particularly pointed out in the claim.-

In the accompanying drawings forming part of this specification, Figure 1'v is a side view of la burner embodying my invention,

Fig. 2 is a longitudinal sectional view-A through the burner head'and tip,ll`ig; 3 is va transverse sectional view oh the'lJney-g/ of Fig. 2, Fig. 4 is a similar view lon. the ]inem-wofFig.'2.f 1- 'fy 'In the drawing, 2 represents the handle of the blow pipe and 3 and 4 acetylene and oxygen' tubes connected therewith and communicating with a source of acetylene gas and oxygen supply, not shown. At'the opposite end ofthe handle 2 pipes '6 and 7 are provided, which communicate through the pipes the burner` proper .is 1nounted.

tapped.

In one end ofthe headafchamber 9 is Ahavmga longitudinal duct therem commuformed; provided with a removable plug 10 whichv allows access l to the chamber. At the inner end of the chamber aA socketis formed, consisting of aninteriorly threaded outer portion 11 and a cylindrical innerpor-v tion 12, preferably of less'diameterthan the outer-portion. Aplugl?) has a part eX-'l teriorly threaded vto' engage the threaded' walls of the socket and a nozzle 1 4 isfori'nedl in the inner endfof the plug which projectsV into the innerportion ,12and isspaced from' the walls thereof, forming an. annular pas'f The pipe Gf-'cm-f sage 15 around the nezzle. municates .through a'i'duct lswith' pas- AcETYLENE-Browrrrn.

' Specification of Letters Patent.

lsage-'and thepipe? withlthe chamber-5 8 represents the head of the burner, intol r which on oneside the pipes 6 and 7 are.

l Patented Apr. 2o, 1915.

Applicationfmeq January 23, 1am.A serial No1, 813,907.

The inner end of the nozzle 14 is prefera tapered' and the plug l'has a central duct 17 for ed therein, extending lengthwise- I thereof and terminating in a'small duct or passage 1 8 which extends through to the end of the nozzle concentric with the duct 17. A tip 19 has a threaded nipple 20 formed on its inner end that is adapted to screw on to asocket in the head, the'nner end of the tip 19 being seated against a shoulder 21 ad- 'acen't to the inner end of the nozzle 14."v

he tip 19 is provided with a central duct 22 5 and the inner 'portion 'of the nipple is counter-sunkto form a seat for the inner end of the nozzle 14:, and said-nipple is provided in its beveled end face with a series of ducts 23 which lead from the passage 15 to the' duct 22 and allow the flow of gas from the passage 15 `to be impinged against 'the streamY of oxygen thatis ydischarged centrally into the duct 22 from the nozzle 14.'

I have found that by providing a series of comparatively tine ducts that the acetylene gas will tlow with greater velocity from the annular passage 12 to mingle with the jet of oxygen from the central duct in the nozzle 14, and thereby a more complete and uniform mixture of the acetylene gas and oxygen 1will take place.

' It will be understood that instead of having the narrow' .ducts in the counter-sunk surface of the tip, they may be formed in the tapered end ofl the nozzle. This, hownot thought necessary to illustrate it herein.

I claim as my invention:

-An acetylene blow pipe comprising a head having' a socket andc-` a chamber formed therein, a plug fitting into said socket and nicating with lsaid chamber'and a nozzle projecting intosfid socketj and spaced from ,the walls therec and forming a passage inner end' of saiditip being countersunk and "s sted aai'ns'tgthe tapered end 0f Said 1102- zIJ'thefcountersunksurface of said tip having a. series of comparatively small ducts In witness whereof, I have'hereunto set leadinghfrcm the pasage au'olllndbsa1 nozmy hand this 14th day of January 1914;

Z e to t e not n sai ftip, W ere 'y't e ve# locty of the How of gas from said passage v 'H' SMITH -5 into the jet of oxygen will be increased and Witnesses:

amore complete and uniform mixtme'ob ,GENEVIEVE E. SORENSEN, tained. A EDWARD A. PAUL. 

